Over temperature treatment method for Formaldehyde Production

    As a Formaldehyde Production Plant, there is some information to share with you. In the process of formaldehyde production, it sometimes causes over-temperature phenomenon. Based on the actual experience in the production process, I made the following analysis:

　　01

　　The steam drum pressure suddenly drops, the batch steam is reduced, sometimes the water is added too fast, the steam drum is full of water, and some instruments fail. Slowly add water, increase the steam pressure, properly increase the batch steam, check whether the meter is normal;

　　02

　　The evaporator liquid level is too low, the evaporation amount is too small, and it is easy to cause over-temperature. The methanol feed amount should be appropriately increased to make up the normal liquid level;

　　03

　　If the meter fails, the air flow suddenly increases, and it is also very easy to overheat. The air volume should be reduced immediately, the instrument should be repaired, and normal production should be resumed.

　　04

　　Sometimes when people do not operate properly, they should strengthen their work and do a good job in pre-natal practical training.

　　05

　　The reboiler process has a low equilibrium concentration and is also easy to over temperature. Sometimes the methanol content is low or the use of crude alcohol, sometimes leaking water and steam, should immediately test the methanol content, replace the use of refined alcohol, and check whether the tube leaks and steam;

Formaldehyde Production Process

　　Extended production cycle of Formaldehyde production process

　　In the Formaldehyde Production Process, in order to be safer, more efficient, less expensive, and extend the driving cycle, it is important to pay attention to it.

　　Do all the preparatory work before driving, and check the maintenance of water, electricity, steam and equipment;

　　It is necessary to turn off the good raw materials, unqualified methanol does not unload the goods, and avoid direct poisoning of the catalyst;

　　Air filtration should be thorough, change the air filter bag frequently, and regularly check and replace the ternary high-efficiency filter;

　　Circulating water and steam drum water should be treated with reverse osmosis to prevent impurities from entering the catalyst chamber, resulting in increased system resistance;

　　Strictly control the process parameters, adjust the aerobic ratio and the concentration of the ingredients. When the alcohol content is 0.5% and the acid content is 0.006% or less, the oxygen temperature is controlled at about 625 °C;

　　When emergency stop is caused by power failure, it is necessary to change the call and return to the vehicle;

　　If the catalyst is poisoned or the resistance is too large, 10 kg of catalyst can be extracted per square, and then 6 to 8 kg of new catalyst can be replenished per square.

　　When the ignition is started, the ratio of aerobic to alcohol should be controlled, and the temperature increase should be increased steadily. Do not overheat;

　　Do routine maintenance, daily inspections, and find problems in a timely manner;

　　To do the above, we usually have a driving cycle of three to four months, and a cycle of 37% formaldehyde consumption is 440 kg.

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